Author: Carlos Lopez <genet...@gmail.com>
Date: Tue Aug 14 10:08:28 2012 +0200
Region: add support for Cairo render.
---
synfig-core/src/modules/mod_geometry/region.cpp | 215 +++++++++++++++++++++++
synfig-core/src/modules/mod_geometry/region.h | 2 +-
2 files changed, 216 insertions(+), 1 deletions(-)
diff --git a/synfig-core/src/modules/mod_geometry/region.cpp
b/synfig-core/src/modules/mod_geometry/region.cpp
index e765373..c536325 100644
--- a/synfig-core/src/modules/mod_geometry/region.cpp
+++ b/synfig-core/src/modules/mod_geometry/region.cpp
@@ -251,3 +251,218 @@ Region::set_time(Context context, Time time, Vector
pos)const
const_cast<Region*>(this)->sync();
context.set_time(time,pos);
}
+
+/////////
+bool
+Region::accelerated_cairorender(Context context,cairo_surface_t *surface,int
quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+ synfig::info("rendering Cairo Region");
+ std::vector<synfig::Segment> segments;
+
+ // Grab the rgba values
+ const float r(color.get_r());
+ const float g(color.get_g());
+ const float b(color.get_b());
+ const float a(color.get_a());
+
+ // Window Boundaries
+ const Point tl(renddesc.get_tl());
+ const Point br(renddesc.get_br());
+ const int w(renddesc.get_w());
+ const int h(renddesc.get_h());
+
+ // Width and Height of a pixel
+ const Real pw = (br[0] - tl[0]) / w;
+ const Real ph = (br[1] - tl[1]) / h;
+
+ // These are the scale and translation values
+ const double sx(1/pw);
+ const double sy(1/ph);
+ const double tx((-tl[0]+origin[0])*sx);
+ const double ty((-tl[1]+origin[1])*sy);
+
+ if(bline.get_contained_type()==ValueBase::TYPE_BLINEPOINT)
+ segments=convert_bline_to_segment_list(bline);
+ else if(bline.get_contained_type()==ValueBase::TYPE_SEGMENT)
+ segments=vector<synfig::Segment>(bline.get_list().begin(),
bline.get_list().end());
+ else
+ {
+ synfig::warning("Region: incorrect type on bline, layer
disabled");
+ return false;
+ }
+
+ if(segments.empty())
+ {
+ synfig::warning("Region: segment_list is empty, layer
disabled");
+ return false;
+ }
+
+ cairo_t* cr=cairo_create(surface);
+ // Let's render the region in other surface
+ // Initially I'll fill it completely with the alpha color
+ cairo_surface_t* subimage;
+ // Let's calculate the subimage dimensions based on the feather value
+ //so make a separate surface
+ RendDesc workdesc(renddesc);
+ int halfsizex(0), halfsizey(0);
+ if(feather && quality != 10)
+ {
+ //the expanded size = 1/2 the size in each direction rounded up
+ halfsizex = (int) (abs(feather*.5/pw) + 3),
+ halfsizey = (int) (abs(feather*.5/ph) + 3);
+
+ //expand by 1/2 size in each direction on either side
+ switch(blurtype)
+ {
+ case Blur::DISC:
+ case Blur::BOX:
+ case Blur::CROSS:
+ {
+
workdesc.set_subwindow(-max(1,halfsizex),-max(1,halfsizey),w+2*max(1,halfsizex),h+2*max(1,halfsizey));
+ break;
+ }
+ case Blur::FASTGAUSSIAN:
+ {
+ if(quality < 4)
+ {
+ halfsizex*=2;
+ halfsizey*=2;
+ }
+
workdesc.set_subwindow(-max(1,halfsizex),-max(1,halfsizey),w+2*max(1,halfsizex),h+2*max(1,halfsizey));
+ break;
+ }
+ case Blur::GAUSSIAN:
+ {
+#define GAUSSIAN_ADJUSTMENT (0.05)
+ Real pw =
(Real)workdesc.get_w()/(workdesc.get_br()[0]-workdesc.get_tl()[0]);
+ Real ph =
(Real)workdesc.get_h()/(workdesc.get_br()[1]-workdesc.get_tl()[1]);
+
+ pw=pw*pw;
+ ph=ph*ph;
+
+ halfsizex =
(int)(abs(pw)*feather*GAUSSIAN_ADJUSTMENT+0.5);
+ halfsizey =
(int)(abs(ph)*feather*GAUSSIAN_ADJUSTMENT+0.5);
+
+ halfsizex = (halfsizex + 1)/2;
+ halfsizey = (halfsizey + 1)/2;
+ workdesc.set_subwindow( -halfsizex, -halfsizey,
w+2*halfsizex, h+2*halfsizey );
+ break;
+#undef GAUSSIAN_ADJUSTMENT
+ }
+ }
+ }
+ subimage=cairo_surface_create_similar(surface,
CAIRO_CONTENT_COLOR_ALPHA, workdesc.get_w(), workdesc.get_h());
+ cairo_t* subcr=cairo_create(subimage);
+ cairo_save(subcr);
+ cairo_set_source_rgba(subcr, r, g, b, a);
+ // Now let's check if it is inverted
+ if(invert)
+ {
+ cairo_paint(subcr);
+ }
+ // Draw the region
+ cairo_translate(subcr, tx , ty);
+ cairo_scale(subcr, sx, sy);
+
+ vector<Segment>::const_iterator iter=segments.begin();
+ double t1x;
+ double t1y;
+ double t2x;
+ double t2y;
+ double p2x;
+ double p2y;
+ double p1x=iter->p1[0];
+ double p1y=iter->p1[1];
+ cairo_move_to(subcr, p1x, p1y);
+ for(;iter!=segments.end();++iter)
+ {
+ t1x=iter->t1[0];
+ t1y=iter->t1[1];
+ t2x=iter->t2[0];
+ t2y=iter->t2[1];
+ p1x=iter->p1[0];
+ p1y=iter->p1[1];
+ p2x=iter->p2[0];
+ p2y=iter->p2[1];
+ cairo_curve_to(subcr, p1x+t1x/3, p1y+t1y/3, p2x-t2x/3,
p2y-t2y/3, p2x, p2y);
+ }
+
+ cairo_close_path(subcr);
+ if(invert)
+ cairo_set_operator(subcr, CAIRO_OPERATOR_CLEAR);
+ else
+ cairo_set_operator(subcr, CAIRO_OPERATOR_OVER);
+ switch(winding_style)
+ {
+ case WINDING_NON_ZERO:
+ cairo_set_fill_rule(subcr, CAIRO_FILL_RULE_WINDING);
+ break;
+ default:
+ cairo_set_fill_rule(subcr, CAIRO_FILL_RULE_EVEN_ODD);
+ break;
+ }
+ if(!antialias)
+ cairo_set_antialias(subcr, CAIRO_ANTIALIAS_NONE);
+
+ cairo_fill(subcr);
+ cairo_restore(subcr);
+ if(feather && quality!=10)
+ {
+ etl::surface<float> shapesurface;
+ shapesurface.set_wh(workdesc.get_w(),workdesc.get_h());
+ shapesurface.clear();
+
+ CairoSurface cairosubimage(subimage);
+ if(!cairosubimage.map_cairo_image())
+ {
+ synfig::info("map cairo image failed");
+ return false;
+ }
+ // Extract the alpha values:
+ int x, y;
+ int wh(workdesc.get_h()), ww(workdesc.get_w());
+ for(y=0; y<wh; y++)
+ for(x=0;x<ww;x++)
+
shapesurface[y][x]=cairosubimage[y][x].get_a()/CairoColor::ceil;
+ // Blue the alpha values
+
Blur(feather,feather,blurtype,cb)(shapesurface,workdesc.get_br()-workdesc.get_tl(),shapesurface);
+ // repaint the cairosubimage with the result
+ Color ccolor(color);
+ for(y=0; y<wh; y++)
+ for(x=0;x<ww;x++)
+ {
+ float a=shapesurface[y][x];
+ ccolor.set_a(a);
+ ccolor.clamped();
+
cairosubimage[y][x]=CairoColor(ccolor).premult_alpha();
+ }
+
+ cairosubimage.unmap_cairo_image();
+ }
+
+ // Put the (feathered) region on the surface
+ if(!is_solid_color()) // we need to render the context before
+
if(!context.accelerated_cairorender(surface,quality,renddesc,cb))
+ {
+ if(cb)
+ cb->error(strprintf(__FILE__"%d: Accelerated
Cairo Renderer Failure",__LINE__));
+ cairo_destroy(cr);
+ cairo_destroy(subcr);
+ cairo_surface_destroy(subimage);
+ return false;
+ }
+ double px(tl[0]-workdesc.get_tl()[0]);
+ double py(tl[1]-workdesc.get_tl()[1]);
+ cairo_save(cr);
+ cairo_set_source_surface(cr, subimage, px, py );
+ cairo_set_operator(cr, CAIRO_OPERATOR_OVER); // TODO: this has to be
the real operator
+ cairo_paint_with_alpha(cr, get_amount());
+ cairo_restore(cr);
+ cairo_surface_destroy(subimage);
+ cairo_destroy(subcr);
+ cairo_destroy(cr);
+
+ return true;
+}
+
+/////////
diff --git a/synfig-core/src/modules/mod_geometry/region.h
b/synfig-core/src/modules/mod_geometry/region.h
index 38e33f3..4694fc5 100644
--- a/synfig-core/src/modules/mod_geometry/region.h
+++ b/synfig-core/src/modules/mod_geometry/region.h
@@ -65,7 +65,7 @@ public:
virtual Vocab get_param_vocab()const;
virtual void set_time(Context context, Time time)const;
virtual void set_time(Context context, Time time, Vector pos)const;
-
+ virtual bool accelerated_cairorender(Context context,cairo_surface_t
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
};
/* === E N D =============================================================== */
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